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Ayumiwii
2016-01-19 09:58:52 +01:00
parent 37aa1eaa18
commit 77e1dacb6f
9 changed files with 195 additions and 64 deletions
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resources/Shaders/ExplosionEffect.geom.glsl
+66 -29
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@@ -11,7 +11,7 @@ uniform float ExplosionDuration;
//uniform float ObjectRadius;
uniform vec4 EndColor;
uniform bool Randomness;
uniform float RandomNumbers[20];
uniform float RandomNumbers[50];
uniform float RandomnessScalar;
uniform vec2 Velocity;
uniform bool ColorByDistance;
@@ -24,13 +24,16 @@ in VertexData{
vec3 Normal;
vec2 TextureCoordinate;
vec4 DiffuseColor;
vec4 ExplosionColor;
}Input[];
out vec3 Normal;
out vec3 Position;
out vec2 TextureCoordinate;
out vec4 DiffuseColor;
out vec4 ExplosionColor;
out VertexData{
vec3 Position;
vec3 Normal;
vec2 TextureCoordinate;
vec4 DiffuseColor;
vec4 ExplosionColor;
}Output;
layout(triangles) in;
layout(triangle_strip, max_vertices = 3) out;
@@ -38,7 +41,7 @@ layout(triangle_strip, max_vertices = 3) out;
// returns a "random" number based on input parameter
float GetRandomNumber(int polygon_index)
{
int randomIndex = int(mod(polygon_index, 20));
int randomIndex = int(mod(polygon_index, 50));
switch (randomIndex)
{
@@ -62,6 +65,36 @@ float GetRandomNumber(int polygon_index)
case 17: return RandomNumbers[17];
case 18: return RandomNumbers[18];
case 19: return RandomNumbers[19];
case 20: return RandomNumbers[20];
case 21: return RandomNumbers[21];
case 22: return RandomNumbers[22];
case 23: return RandomNumbers[23];
case 24: return RandomNumbers[24];
case 25: return RandomNumbers[25];
case 26: return RandomNumbers[26];
case 27: return RandomNumbers[27];
case 28: return RandomNumbers[28];
case 29: return RandomNumbers[29];
case 30: return RandomNumbers[30];
case 31: return RandomNumbers[31];
case 32: return RandomNumbers[32];
case 33: return RandomNumbers[33];
case 34: return RandomNumbers[34];
case 35: return RandomNumbers[35];
case 36: return RandomNumbers[36];
case 37: return RandomNumbers[37];
case 38: return RandomNumbers[38];
case 39: return RandomNumbers[39];
case 40: return RandomNumbers[40];
case 41: return RandomNumbers[41];
case 42: return RandomNumbers[42];
case 43: return RandomNumbers[43];
case 44: return RandomNumbers[44];
case 45: return RandomNumbers[45];
case 46: return RandomNumbers[46];
case 47: return RandomNumbers[47];
case 48: return RandomNumbers[48];
case 49: return RandomNumbers[49];
}
}
@@ -102,8 +135,16 @@ void main()
// time percentage until end of explosion (0.0-1.0)
float timePercetage = TimeSinceDeath / ExplosionDuration;
// get a random number if randomness is enabled, otherwise the random number will be zero and won't affect the other algorithms
if (Randomness == true)
{
randomDistance = GetRandomNumber(gl_PrimitiveIDIn) * RandomnessScalar;
}
vec2 randomVelocity = Velocity * (randomDistance + 1.0);
// accelaration to use on current frame. is a interpolation between start and end value
float currentVelocity = mix(Velocity.x, Velocity.y, timePercetage);
float currentVelocity = mix(randomVelocity.x, randomVelocity.y, timePercetage);
if (ExponentialAccelaration == true)
{
@@ -113,12 +154,6 @@ void main()
// distance between origin and the center of the current triangle
float origin2TriangleCenterDistance = length(origin2TriangleCenterVector);
// get a random number if randomness is enabled, otherwise the random number will be zero and won't affect the other algorithms
if (Randomness == true)
{
randomDistance = GetRandomNumber(gl_PrimitiveIDIn) * RandomnessScalar;
}
// the distance from origin to the triangle center with eventual randomness added
float fullDistanceWithRandomness = origin2TriangleCenterDistance + randomDistance;
@@ -130,20 +165,20 @@ void main()
{
float maxRadius = max(TimeSinceDeath * currentVelocity, (ExplosionDuration * currentVelocity));
float a = (Velocity.y - Velocity.x) / ExplosionDuration;
float a = (randomVelocity.y - randomVelocity.x) / ExplosionDuration;
//float t = sqrt((2 * origin2TriangleCenterDistance) / a);
// if explosion color should be affected by distance instead of time...
if (ColorByDistance == true)
{
// calculate the max distance (s) the triangle will move
float s = (Velocity.x * ExplosionDuration) + (0.5 * a * pow(ExplosionDuration, 2));
float s = (randomVelocity.x * ExplosionDuration) + (0.5 * a * pow(ExplosionDuration, 2));
ExplosionColor = EndColor * (length(triangleCenter2ExplosionRadius) / s);
Output.ExplosionColor = EndColor * (length(triangleCenter2ExplosionRadius) / s);
}
else
{
ExplosionColor = EndColor * timePercetage;
Output.ExplosionColor = EndColor * timePercetage;
}
// for every vertex on the triangle...
@@ -153,10 +188,10 @@ void main()
vec3 ExplodedPosition = Input[i].Position + triangleCenter2ExplosionRadius;
// pass through vertex data
Normal = Input[i].Normal;
Position = Input[i].Position;
TextureCoordinate = Input[i].TextureCoordinate;
DiffuseColor = Input[i].DiffuseColor;
Output.Normal = Input[i].Normal;
Output.Position = Input[i].Position;
Output.TextureCoordinate = Input[i].TextureCoordinate;
Output.DiffuseColor = Input[i].DiffuseColor;
// convert to model space for the gravity to always be in -y
vec4 ExplodedPositionInModelSpace = M * vec4(ExplodedPosition, 1.0);
@@ -179,25 +214,27 @@ void main()
// if explosion color should be affected by distance instead of time...
if (ColorByDistance == true)
{
ExplosionColor = vec4(0.0);
Output.ExplosionColor = vec4(0.0);
}
else
{
ExplosionColor = EndColor * timePercetage;
Output.ExplosionColor = EndColor * timePercetage;
}
// for every vertex on the triangle...
for(int i = 0; i < gl_in.length(); i++)
{
// pass through vertex data
Normal = Input[i].Normal;
Position = Input[i].Position;
TextureCoordinate = Input[i].TextureCoordinate;
DiffuseColor = Input[i].DiffuseColor;
Output.Normal = Input[i].Normal;
Output.Position = Input[i].Position;
Output.TextureCoordinate = Input[i].TextureCoordinate;
Output.DiffuseColor = Input[i].DiffuseColor;
// no change in position, pass through vertex
gl_Position = gl_in[i].gl_Position;
EmitVertex();
}
}
}
//EndPrimitive();
}